Machine for forming spoke-holes in hubs.



No. 690,906. Patented Jan. 7, I902.

E.-EINFELDT.

MACHINE FOR FORMING SPOKE HOLES IN HUBS.

(Application filed Aug. 28, 1901.] (No Model.) 2 Sheets-Sheet l.

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- No; 690,906. Patented Jan: 7, 1902. E.'E|NFELD'F.

MACHINE FUR FGRMING SPOKE HOLES IN HUBS.

7 (Application filed Aug. 28, 1901.)

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EMIL EINEELDT, OF DAVENPORT, IOWVA, ASSIGNOR TO BETTENDORE METAL WHEELCOMPANY, A CORPORATION OF ILLINOIS.

MACHINE FOR FORMING SPOKE=HOLES IN HUBS.

SEE-GIFISATIQN forming part of Letters Patent No. 690,906, dated January'7, 1 2- Application filed August 28, 1901. Serial No. 73,608. Nomodel.)

To all whom it may concern.-

Be it known that I, EMIL EINFELDT, of Davenport, county of Scott, andState of Iowa, have invented a new'and useful Improvement in Machinesfor Forming Spoke-Holes in I-Iubs, of which the following is aspecification.

This invention relates to a machine for forming spoke-holes inwheel-hubs, and has reference more particularly to means for holding thehub in predetermined positions to receive the holes at predeterminedpoints and in two rows for staggered spokes.

The invention consists, primarily, of a device adapted to hold the hubtemporarily in predetermined positions to receive one row of holes andso formed that by the reversal of the hub end for end it will be held insuch predetermined positions with relation to the hole-forming devicethat the holes of the second row will be formed opposite the intervalsbetween the holes of the previouslyformed row.

The invention consists also in the details of construction andcombination of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation of myimprovedmachine, show ing the hub in place to be acted on by the punch. Fig. 2is a top plan view with the punch omitted to expose the other parts toview. Fig. 8 is afront elevation of the machine. Fig. 4 is adiagrammatic view showing how by the reversal of the hub the-secondseries of holes will alternate with the first series.

Referring to the drawings, the machine comprises a hole-formic g devicein the form of a vertically-movable punch 1 and a hubholding device inthe form of a core 2, adapted to extend withinthe hub and present thesame beneath the punch, as shown in Fig. 1. These parts are mounted in aframe 3, having an overhanging portion in which the punch is mounted toreciprocate vertically, and an underlying horizontal bed portion whichgives support to the hub-holding device.

The hub-holding core is formed on the inner end of a horizontal stem 8mounted to rotate in a frame 4, which frame is mounted slidingly on twohorizontal guide-rods 5, projecting outward from the main frame, the

arrangement being such that the slidingframe may be moved out on itsguide-rods to permit the hub to he slipped on the core and then 51inward to bring the hub beneath the punch. The hub-holding core isformed to be detachably engaged with the hub, to the end that they willfor the time being he held in fixed relations, and the core is adaptedwhen thus engaged withthe hub to be rotated step by step to successivelypresent the hub at predetermined points beneath the punch, means beingprovided for determining or governing the rotary movement of the hub tocontrol the intervals between the holes. The construction of the partsto effect these results may be varied; but I prefer that shown in thedrawings, in which the core is provided with a laterally-projecting pin6, adapted to enter a hole formed in the hub about midway between itsends. The relative size of the core is such that the pin may be readilyengaged or disengaged in the hole by a lateral movement of the hub withrelation tothe core. At the outer side of the sliding frame the stem 3has fixed to it a wheel7, having in its periphery a series of teeth 8,spaced apart a distance corresponding to the distance be tween the holesto be formed in the hub, a pawl 9 being mounted on. the frame inposition to engage between the teeth and hold the wheel temporarily inits predetermined positions. This pawl is limited in its movement in onedirection-that opposite the direction of rotation of the wheel-by a stop10, so that while the pawl will yield to permit the wheel to be advancedin one direction it will hold the wheel against return movement, theresult being that the core, by means of the 9; wheel and pawl, may beadvanced accurately step by step the same distance each time and heldbetween each movement. On the outer end of the stem is a handle in theform of a knob 11, by which it maybe turned and held 3 by the hand.

Vertically beneath the punch 1 is arranged a fixed anvil 12, which isadapted to extend within the end of the hub when the latter is moved upto the position for punching, and too it serves to give support to thehub at the point where the punch enters the same.

In the operation of the mechanism to form the rows of holes in the hubthe operator grasps the knob 11 and slides the frame outward to giveroom for the hub to be set in place on the core. The hub is slipped overI the end of the core and the pin (5 entered in the central hole in thehub. The frame is now pushed forward on its guides, the end of the hubbeing passed over the anvil beneath the punch. The latter descends andforms a hole in the hub, after which it ascends, and while free of thehub the operator by means of the knob 11 rotates the toothed wheel onetooth, the pawl yielding and dropping back in place behind the nexttooth and holding the Wheel in this position. The punch again descendsand forms a second hole, spaced from the first hole a distance equal tothat between the first and second teeth on the wheel, and so on, theseoperations being repeated until the entire row of holes, accuratelyspaced, has been formed in one end of the hub. After this operation theoperator again slides the frame outward, disengages the hub from the pinon the core, and reverses the same end I for end, again inserting thepin in the hole in I the hub for the purpose of punching the holes inthe other end of the hub to receive the second row of spokes forstaggered wheels. In wheels of this character the spokes at one end areset in the intervals between the spokes at the opposite end of the hub,and in order that when the hub is reversed in the machine on the core,as just described, the secondrow of holes will thus alternate with thefirst row I so form the parts with relation to each other that when thehubis presented in its reversed position to the punch it will be sodisposed that the holes formed by the punch will alternate with those ofthe row previouslyformed. I accomplish this result by so forming andarranging the teeth on the wheel with relation to the pawl, to the pin6, and the punch that the pin when the pawl is holding the wheel byengaging between the teeth thereon will be to one side of a lineextending longitudinally of the core and touching the punch, as

illustrated in the diagrammatic View, Fig. 4.

As a result of this arrangement the reversal of the hub on the coreshifts the previouslyformed hole to one side with relation to the punch,and consequently presents surfaces beneath the punch which will beopposite the spaces between the holes of the first row.

It is important that the degree of offset of the pin be just half thedistance between the holes; otherwise if the offset to one side wereequal the distance between the holes the holes of the second rowformed'on the reversal of the hub would be directly opposite thel holesof the first row.

Having thus described my invention, what I claim is 1. In combinationwith a hole-forming tool,

same 1n reverse positions to the tool to retion of the tool and engagingmeans being such that the holes formed in one end will be opposite theintervals between the holes in the other end.

2. The combination with a hole-forming tool, of a hub-holding deviceadapted to present the hub in predetermined positions with relation tothe tool, and means for engaging the holding device with the hub inreverse positions; whereby both ends of the hub may be presented to thetool.

3. In combination with an operating-tool, a hub-holding device adaptedto present the hub in predetermined positions to the tool and means forengaging the hub with the holding device in reverse positions, saidmeans being so formed with relation to the tool that the holes formed inthe two ends of the hub will alternate with each other. v

4. In combination with a hole-forming device, an anvil fixed beneath thesame, a rotating core adapted to enter one end of a hub and movable toand from the anvil; whereby the opposite end of the hub may be presentedover the anvil to the action of the tool.

5. In combination with an operating-tool, a hub-holder comprising arotary device adapted to enter the hub, means for,engaging the devicewith the hub in reverse positions and means for determining the movementof the device to advance the hub step by step.

6. In combination with ahole-forming tool, a rotary core adapted toextend within the hub and provided with a pin arranged to enter a holein the hub; whereby the hub may be reversed end for end on the core, andmeans for determining the movement of the core to present the hub to thetool in predetermined positions.

7. In combination with rotary core provided with one side of alongitudinal core and tool.

8. In combination with a hole-forming tool, a slide movable to and fromthe same, a rotary hub-holder carried by the slide and adapted to engageand present a hub to the action of the tool, and means for rotating thehub holder to present the hub at predetermined positions with referenceto the tool.

In testimony whereof I hereunto set my hand, this 17th day of June,1901, in the presence of two attesting witnesses.

EMIL EINFELDT.

an operating-tool, a a pin arranged to plane through the Vitnesses;

N ATH FRENCH, MAY L. DODGE.

IOCH

